NGC 6664: A Faint Letter “M” Cluster in Scutum

NGC 6664 is an open cluster in the constellation Scutum. It’s best viewed in late summer and early autumn. William Herschel discovered on June 16, 1784. This 7th magnitude cluster is almost 4000 light years away from us. While fairly dim under suburban skies, you can enjoy it with most telescopes. My Observations September 6,ContinueContinue reading “NGC 6664: A Faint Letter “M” Cluster in Scutum”